Linux security courses can help you learn system hardening, user access controls, network security protocols, and incident response strategies. You can build skills in configuring firewalls, implementing encryption techniques, and conducting security audits. Many courses introduce tools like iptables for firewall management, OpenSSL for encryption, and Wireshark for network analysis, showing how these skills are applied in practical work to protect systems from vulnerabilities and threats.

University of Colorado Boulder
Skills you'll gain: Virtual Networking, Network Troubleshooting, Linux, Kubernetes, Network Architecture, Network Administration, Computer Networking, Docker (Software), TCP/IP, Network Routing, Containerization, Network Switches, Firewall, Network Protocols
Build toward a degree
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Linux Administration
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Linux Servers, Linux Administration, Command-Line Interface, Bash (Scripting Language), Apache, Performance Tuning, Operating System Administration, Linux Commands, Web Servers, Server Administration, System Monitoring, Virtualization, Network Administration, Virtual Machines, System Configuration, File Management, Software Installation, Package and Software Management
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Linux, Linux Administration, Operating System Administration, File Systems, User Accounts, Data Storage, Systems Administration, File Management, Performance Tuning, Data Storage Technologies, System Configuration, Security Controls
Intermediate · Course · 1 - 4 Weeks

Packt
Skills you'll gain: Command-Line Interface, Linux, Ubuntu, Linux Administration, Linux Commands, Unix Commands, Operating System Administration, Unix, Software Installation, Red Hat Enterprise Linux, System Configuration, Network Troubleshooting, User Accounts, Networking Hardware, Network Support, File Systems, Open Source Technology, File Management, Package and Software Management, Computing Platforms
Beginner · Course · 1 - 3 Months

Skills you'll gain: Linux Administration, Package and Software Management, Linux, User Accounts, Operating System Administration, System Monitoring, Linux Commands, Amazon Web Services, Unix Commands, Network Troubleshooting, File Management, Command-Line Interface, Amazon Elastic Compute Cloud, Systems Administration, Operating Systems, Shell Script, General Networking, Service Management
Beginner · Course · 1 - 3 Months

Coursera
Skills you'll gain: Linux Commands, Linux, Unix Commands, Command-Line Interface, File Management, System Configuration, Linux Administration, Package and Software Management, DevOps
Beginner · Guided Project · Less Than 2 Hours

LearnQuest
Skills you'll gain: Version Control, Git (Version Control System), Linux, Cloud Computing Architecture, DevOps, Virtualization, Cloud Computing, Cloud Infrastructure, Containerization, Infrastructure As A Service (IaaS), Software As A Service, Virtual Networking, Virtual Machines, Platform As A Service (PaaS)
Beginner · Course · 1 - 4 Weeks

Mixed · Course · 1 - 4 Weeks

Skills you'll gain: System Monitoring, Shell Script, Bash (Scripting Language), Unix Shell, User Accounts, Linux Commands, Network Monitoring, Linux, Systems Administration, Linux Administration, Operating System Administration, Unix, Ubuntu, Unix Commands, Network Troubleshooting, System Configuration, File Management, File Systems, Command-Line Interface, Red Hat Enterprise Linux
Intermediate · Course · 1 - 4 Weeks

Packt
Skills you'll gain: Linux, Linux Administration, Linux Commands, File Management, User Accounts, OS Process Management, Unix Shell, Command-Line Interface, General Networking, Shell Script, Operating Systems, Scripting, System Monitoring
Intermediate · Course · 1 - 3 Months

Simplilearn
Skills you'll gain: Package and Software Management, File Systems, File Management, Linux Administration, Unix, Linux Commands, Unix Commands, Command-Line Interface, Operating Systems, System Monitoring, Open Source Technology, User Accounts, Software Installation
Beginner · Course · 1 - 4 Weeks